 <html>
  <head>
    {% block head %}
    <link rel="stylesheet">
    {% endblock %}
  </head>
  <body>
    {% include "./header.html" %}
    {% block body %}
    <h1>this is body</h1>
    {% endblock %}
    {% include "./footer.html" %}
    {% block content %}
      <script>
        //this is place for javascript
      </script>
    {% endblock %}
  </body>
</html>
